Isabella County Power Outage History
2014–2025 · Michigan
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 15, 2018 | 7 hrs | 9,427 (24%) | Winter Storm |
| Jul 20, 2019 | 32 hrs | 7,611 (19%) | Unnamed event |
| Dec 26, 2025 | 130 hrs | 7,174 (18%) | Unnamed event |
| Aug 11, 2021 | 19 hrs | 6,851 (17%) | Thunderstorm Wind |
| Aug 6, 2019 | 9 hrs | 5,933 (15%) | Unnamed event |
Over the 12 years from 2014 to 2025, Isabella County recorded 341 distinct power outage events, averaging 5.3 hours per event.
The single worst outage on record in Isabella County started April 15, 2018 (Winter Storm), lasting 7 hours and leaving up to 9,427 customers without power (24% of the county) at its peak.
August has historically been the worst month for outages in Isabella County, with 41 events recorded during that month across the dataset.
Based on this history, Isabella County earns a Reliability Grade of C, placing it in the 49th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Isabella County's outage profile
See more picks in our Best Dual-Fuel Portable Generators for Power Outages roundup.
Champion Power Equipment 4375-Watt Dual Fuel RV Ready Portable Generator with Free 3-Year Warranty
Outage-prep kit
See our outage-prep guides or the Michigan storm prep checklist.
Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Isabella County.
| County | Grade | National percentile |
|---|---|---|
| Marquette County | C | 49th |
| Ingham County | C | 49th |
| Alger County | C | 50th |
| Chippewa County | C | 48th |
| Baraga County | C | 48th |
FAQ
How often does power go out in Isabella County?
Between 2014 and 2025, Isabella County recorded 341 outage events, averaging 5.3 hours each.
What is Isabella County's reliability grade?
Isabella County has a Reliability Grade of C, in the 49th national percentile.
What was the worst power outage in Isabella County?
The worst outage on record started April 15, 2018 (Winter Storm), lasting 7 hours and affecting up to 9,427 customers.